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EP1301742A1 - Feu de gabarit avec optique a encadrement - Google Patents

Feu de gabarit avec optique a encadrement

Info

Publication number
EP1301742A1
EP1301742A1 EP01949813A EP01949813A EP1301742A1 EP 1301742 A1 EP1301742 A1 EP 1301742A1 EP 01949813 A EP01949813 A EP 01949813A EP 01949813 A EP01949813 A EP 01949813A EP 1301742 A1 EP1301742 A1 EP 1301742A1
Authority
EP
European Patent Office
Prior art keywords
marker lamp
lens cover
light
lamp
picture frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01949813A
Other languages
German (de)
English (en)
Inventor
Philip C. Roller
Jon A. Stineman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Truck Lite Co LLC
Original Assignee
Truck Lite Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Truck Lite Co LLC filed Critical Truck Lite Co LLC
Publication of EP1301742A1 publication Critical patent/EP1301742A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/32—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating vehicle sides, e.g. clearance lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/255—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention is related to a marker lamp for vehicles, more particularly, a marker lamp that does not require the use of mirrors or reflectors to distribute light.
  • Marker lights are an important factor in the safe operation of vehicles, especially trucks. Marker lights must be easily recognized and must be well defined in terms of color, light intensity and light distribution.
  • a marker lamp will be used along side of a vehicle to indicate the overall shape, length and width of a vehicle. To accomplish this, the marker lamp must distribute light over a wide range .
  • Marker lamps have been made by high power consuming incandescent bulbs, light emitting diodes and the use of reflective surfaces (mirrors) to get a wide range of light diffusion.
  • Another design of marker apparatus exists, a reflector, whose construction allows the lamp to reflect the light beam emitted from an automobile.
  • These types of markers are usually used on the side of the road so that a driver can recognized the road boundary.
  • the design of this type of marker is limited since the efficiency of recognition depends on the intensity of the light beam produced by oncoming vehicles. A vehicle without headlamps, for example, will not produce light that may be reflected.
  • Combination marker/clearance lamps that are made by using light-emitting diodes exist.
  • the advantage of using light- emitting diodes in lamps is that a light emitting diode has a relatively long service life and low power requirements.
  • Most of the other designs require a large number of light- emitting diodes and complicated optics to allow the correct light intensity and distribution. Large numbers of light- emitting diodes produce additional heat, which must be removed from the lamp, since heat will affect the performance of the light emitting diodes. Thus, heat dissipation elements must be added and these elements complicate the design of the lamps.
  • the other designs require the use of reflective surfaces (usually mirrors) , or segmented circuit boards to which are mounted light-emitting diodes to provide for different light distribution, or aimed light- emitting diodes.
  • Segmented boards require special mounting considerations and generally can not be potted for protection. This makes the construction of the lamp using segment circuit boards more complicated and potentially more fragile.
  • marker lamps do not meet both the United States (and the Society of Automotive Engineers) and European standards for marker lamps. Also, other designs of marker lamps do not allow both horizontal and vertical mounting while continuing to meet the U.S. and European standards.
  • the United States standards are usually less stringent than the Society of Automotive Engineers ("SAE") standards.
  • SAE Society of Automotive Engineers
  • the SAE standards require that marker lamps produce a light intensity of 0.25 cd for a red colored lamp and 0.62 cd for an amber colored lamp over a range of 45 degrees in each direction from a reference axis.
  • the United Nations (U.N.) standards for the European Community require that marker lamps produce a minimum light intensity of 4.0 cd (in the axis of reference) and 0.6 cd within the specific angular field.
  • the U.N. standards require that marker lamps have a maximum light intensity of 25.0 cd.
  • the U.N. standards require a vertical light distribution over at least 10 degrees in each direction from a reference axis in the center of the lamp.
  • the U.N. standards require a horizontal distribution over at least 30 degrees in each direction from a reference axis in the center of the lamp.
  • U.S. Patent 5,388,035 shows a circular marker lamp using only three light -emitting diodes. Each of the light-emitting diodes is aimed at a specific angle so that the conical light output beam is centered on an axis that is normal to the plane of the lens wall.
  • the rear surface of the lens front wall contains three different sets of light spreading prism ribs, which need to be optically aligned with each light-emitting diode.
  • U.S. Patent 1,530,621 teaches the use of a conical reflector as part of an optical system to direct light towards a single spot as used in a light projector.
  • U.S. Patent 2,254,961 discloses the use of a unitary lens, light and reflector system in which an outwardly curved portion (bubble shape) is present in the center of the lens.
  • U.S. Patent 3,633,022 is generally directed to a lamp having a lens, a light source, and a reflector.
  • the lens has an outer surface that acts as a dispersing lens.
  • This dispersing element is form by a double concave cylindrical lens with a double grooved shape.
  • the design is directed to an incandescent lamp, which uses reflectors to accomplish the desired spread and intensity of light.
  • U.S. Patent 5,580,156 illustrates a marker apparatus for traffic capable of improving the recognition efficiency by using the enhancing effect of a light source beam and a reflected light beam.
  • the marker apparatus is used at road boundaries to help drivers recognize the boundaries of the road.
  • the marker apparatus accomplishes this by the use of a retroreflector which is composed of three reflective surfaces arranged on three surfaces of a trigonal pyramid and a light source disposed on an optical axis of the retroreflector.
  • a disadvantage of this design it is slightly bulky with more than three light-emitting diodes required.
  • a marker lamp for automotive vehicles comprises: a housing mountable to a vehicle, a circuit board attached to the housing, at least one light emitting diode attached to the circuit board, a lens cover attached to the housing, optical elements incorporated in the lens cover.
  • the invention also uses seals, resistors, and cables such that power is supplied to the marker lamp and the lamp can be assimilated into the overall vehicle power system.
  • the optics design does not require a mirror to produce the light intensity and angular distribution required by the United States and by the United Nations standards for the European Community for marker lamps.
  • the resultant lamp will be a marker lamp that is sturdy, slim, and reasonably priced.
  • the resultant lamp can also be mounted either horizontally or vertically as respects the long axis of the lamp, while still meeting the aforementioned standards.
  • the present invention uses preferably a combination of corner cube optics and intersecting cylindrical prisms or picture frame optics in the lens of the lamp.
  • This corner cube optics is also known as retrodirective reflectors or reflex reflectors.
  • the reflex reflectors at each side of the lens of the marker lamp efficiently reflects light from outside sources such as an incoming car, or a roadside traffic lamp, or the sun.
  • the center portion of the lens of the marker lamp is formed by a series of cylindrical prisms intersecting each other, in such a way to resemble the appearance of a picture frame.
  • the center portion could also be modified from the present description with a simple convex lens.
  • the function of the center portion of the lens is to concentrate the light from the light emitting diodes and distribute the light over the desired parameters.
  • - Fig. 1 is a three-dimensional front view image of the marker lamp described in the invention.
  • - Fig. 2 is a front view of the marker lamp.
  • FIG. 3 is an exploded cross section of the marker lamp embodying features of the invention.
  • Fig. 4a and 4b are close up views of the reflex reflectors and the picture frame optics, respectively.
  • - Fig. 5 is a pictorial representation of a beam of light being reflected by the reflex reflectors.
  • - Fig. 6 is a pictorial representation of the beam of light from the light emitting diodes toward the center optics in the marker lamp.
  • Fig. 1 shows a three dimensional front view of the marker lamp 10 featured in the invention.
  • the lamp 10 possesses a lens 20 and the housing 30.
  • the lens 20 is composed of two sets of reflex reflectors 50 at opposite sides of lens 20.
  • the reflex reflectors 50 reflect outside light, such as sun light or light from the headlamp of an incoming vehicle.
  • the middle portion of center section 60 of lens 20 is composed of intersecting cylindrical prisms 61, with ribs 62 at the top and bottom of the center portion 60 of the lens 20. Each cylindrical prism 61 will intersect another forming a square, similar to a picture frame.
  • the housing 30 and lens cover 20 can be made of the same material.
  • a preferred material is polycarbonate.
  • the "picture frame” optics as used in here is defined as a series of intersecting cylindrical prisms, forming or having the appearance of a picture frame. Each picture frame optic will frame smaller picture frame optics. This entire repetitive formation can be repeated to form consecutive picture frames placed side-by-side and surrounded by a rectangle 63 formed by intersecting cylindrical surfaces. In a preferred embodiment three consecutive picture frame are utilized. One skilled in the art will understand that a greater or lesser number of consecutive picture frames can be used.
  • Fig.l also shows the holes 40 through which screws can attach the lamp onto the vehicle.
  • Fig. 1 depicts the power cables 7, which will provide power to light the light-emitting diodes and which integrate the marker lamp with the power of the vehicle.
  • Fig. 2 displays a front view of the marker lamp.
  • Fig. 2 depicts, again, the rows of reflex reflectors 50, the cylindrical prisms 61, the ribs 62, rectangle 63 and the attachment holes 40 present in the housing 30.
  • apart from the intersecting cylindrical prisms there are a set of ribs 62 at the top and bottom of the picture frame optics.
  • a three-picture frame optics system is used. It should be understood that the number of picture frames or cylindrical prisms are not intended to be limited by this embodiment. An increase or decrease in the number of cylindrical prisms and picture frames are possible modifications to this embodiment.
  • Fig. 3 is a cross section according to line A from Fig. 2.
  • the one-piece lens 20 is shown with the reflex reflectors 50 and the picture frame optics 60.
  • the three light-emitting diodes 70 are shown inserted on a circular shaped circuit board 90 .
  • the circuit board could take any shape, however, for the most preferred embodiment, the circuit board 90 is circular.
  • the circuit board 90 and light emitting diodes 70 are embedded in a potting material for stability and protection from moisture.
  • the potting material also acts to dissipate heat created by the light emitting diodes 70.
  • a preferred potting material is epoxy although other materials may be used.
  • the housing 30 is attached to the lens 20 and hermetically sealed, thereby sealing the whole lamp so that water and dust cannot enter the lamp. Cable connectors 80 are attached to the housing 30 such that the . joining of the cables 7 to the circuit board 90 is not disturbed by loose wires.
  • Fig. 4a and 4b show close ups of the optics present in the lens 20.
  • the reflex reflectors 50 are shown.
  • the first row of three-dimensional cubes 51 is shown.
  • the back row 52 of reflex reflectors is also illustrated.
  • Fig. 4b one set of intersecting cylindrical prisms is shown.
  • the site 61 of intersection is shown from one of the corners of the picture frame optic.
  • Fig. 5 illustrates how the reflex reflectors 50 will reflect a beam of light from an outside source 13 such as the sun.
  • the beams of light 11 emitted from the outside source 13 will be reflected by the reflex reflectors 50 and fan back to the outside as a spread of light 12. This reflected light distribution is due to the 90-degree angles present in the reflex reflectors 50.
  • Fig. 6 shows the function of the intersecting cylindrical prisms 60.
  • the cone of light 14 produced by the light emitting diodes 70 will be concentrated or collimated by the picture frame and cylindrical prisms 60 to provide the light intensity and spread 15.
  • the combination of the spread of light 15, shown in Fig. 6, and the spread 12, shown in Fig. 5, will provide for the light intensity and distribution required for meeting legal requisites for the United Nations standards for the European Community and United States.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Cette invention concerne un feu de gabarit (10) qui ne fait pas intervenir de miroirs ou de réflecteurs. Ce feu (10) comporte sur un couvercle de lentille (20) une combinaison d'éléments optiques qui répartissent la lumière conformément aux normes des Etats-Unis d'Amérique et des Nations Unies régissant les feux de gabarit pour la Communauté européenne. Le feu de gabarit (10) utilise comme source lumineuse un nombre réduit de diodes électroluminescentes (70), trois au maximum. Les éléments optiques sont agencés de telle sorte que les surfaces de rétroréflecteur (50) se trouvent sur les côtés et les lentilles convexes (61, 62, 63) au centre (60) du couvercle de lentille (20). Le feu de gabarit (10) est mince et robuste.
EP01949813A 2000-07-07 2001-07-09 Feu de gabarit avec optique a encadrement Withdrawn EP1301742A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US21685000P 2000-07-07 2000-07-07
US216850P 2000-07-07
PCT/IB2001/001220 WO2002004857A1 (fr) 2000-07-07 2001-07-09 Feu de gabarit avec optique a encadrement

Publications (1)

Publication Number Publication Date
EP1301742A1 true EP1301742A1 (fr) 2003-04-16

Family

ID=22808744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01949813A Withdrawn EP1301742A1 (fr) 2000-07-07 2001-07-09 Feu de gabarit avec optique a encadrement

Country Status (6)

Country Link
US (1) US6612728B2 (fr)
EP (1) EP1301742A1 (fr)
AU (1) AU2001270926A1 (fr)
CA (1) CA2384330A1 (fr)
MX (1) MXPA02002492A (fr)
WO (1) WO2002004857A1 (fr)

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US11670900B2 (en) 2019-02-05 2023-06-06 Emergency Technology, Inc. Universal smart adaptor

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Also Published As

Publication number Publication date
CA2384330A1 (fr) 2002-01-17
US6612728B2 (en) 2003-09-02
AU2001270926A1 (en) 2002-01-21
WO2002004857A1 (fr) 2002-01-17
US20020003708A1 (en) 2002-01-10
MXPA02002492A (es) 2004-09-10

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